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exq
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Exq is a job processing library compatible with Resque / Sidekiq for the Elixir language.
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lib/exq/enqueuer/server.ex
defmodule Exq.Enqueuer.Server do
@moduledoc """
The Enqueuer is responsible for enqueueing jobs into Redis. It can
either be called directly by the client, or instantiated as a standalone process.
It supports enqueuing immediate jobs, or scheduling jobs in the future.
## Initialization:
* `:name` - Name of target registered process
* `:namespace` - Redis namespace to store all data under. Defaults to "exq".
* `:queues` - Array of currently active queues (TODO: Remove, I suspect it's not needed).
* `:redis` - pid of Redis process.
* `:scheduler_poll_timeout` - How often to poll Redis for scheduled / retry jobs.
"""
require Logger
alias Exq.Support.Config
alias Exq.Redis.JobQueue
use GenServer
defmodule State do
defstruct redis: nil, namespace: nil
end
def start_link(opts \\ []) do
GenServer.start_link(__MODULE__, opts, name: server_name(opts[:name]))
end
##===========================================================
## gen server callbacks
##===========================================================
def init(opts) do
{:ok, %State{redis: opts[:redis], namespace: opts[:namespace]}}
end
def handle_cast({:enqueue, from, queue, worker, args, options}, state) do
response = JobQueue.enqueue(state.redis, state.namespace, queue, worker, args, options)
GenServer.reply(from, response)
{:noreply, state}
end
def handle_cast({:enqueue_at, from, queue, time, worker, args, options}, state) do
response = JobQueue.enqueue_at(state.redis, state.namespace, queue, time, worker, args, options)
GenServer.reply(from, response)
{:noreply, state}
end
def handle_cast({:enqueue_in, from, queue, offset, worker, args, options}, state) do
response = JobQueue.enqueue_in(state.redis, state.namespace, queue, offset, worker, args, options)
GenServer.reply(from, response)
{:noreply, state}
end
def handle_call({:enqueue, queue, worker, args, options}, _from, state) do
response = JobQueue.enqueue(state.redis, state.namespace, queue, worker, args, options)
{:reply, response, state}
end
def handle_call({:enqueue_at, queue, time, worker, args, options}, _from, state) do
response = JobQueue.enqueue_at(state.redis, state.namespace, queue, time, worker, args, options)
{:reply, response, state}
end
def handle_call({:enqueue_in, queue, offset, worker, args, options}, _from, state) do
response = JobQueue.enqueue_in(state.redis, state.namespace, queue, offset, worker, args, options)
{:reply, response, state}
end
def terminate(_reason, _state) do
:ok
end
# Internal Functions
def server_name(name) do
name = name || Config.get(:name)
"#{name}.Enqueuer" |> String.to_atom
end
end